Quote:
Originally Posted by AlCan
I would almost guarantee that's what's causing these chains to snap. I haven't surveyed it, but I'm willing to wager that snapped MD chains always have broken tensioner springs (first). And that they always break on startup, after a longer period of not running.
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EEeeee! Well, I got that wrong...
Watched some of the video of the split cam sprocket hub again.
Having an intact tensioner spring is no guarantee that your MD chain won't break. So I guess the overriding thing is chain wear, which comes down to chain lubrication.
Franco - Thanks for your adventurous account! What a machine! Yes, I believe these engines are very durable and can take a thorough hiding, so long as the oil is maintained. Howatt's taxis have been getting much higher k's - equal numbers of MILES! Like I say, my 2011 engine has even more k's on it than yours, and is still going strong. Maybe 90% of its ponies still home. It even still has its original EGR valve still connected and working correctly (touch wood), so it hasn't had a lazy life. (Haven't tried disabling that one [no need anyway] as it has an
ECU return signal so would probably throw the Mother-In-Law light...)
I've towed a fully loaded, covered 8x4 trailer to the South Island multiple times - it gets around 8l/100km on those trips but can still get 5.6l/100km on a trip through snow and ice in Tiptronic mode (without trailer of course). And the cam chain is still quiet...